Hey guyssss.. I need some help in finding this manga that i have read a long long time ag...

Hey guyssss.. I need some help in finding this manga that i have read a long long time ago. It is a fantasy or supernatural if i'm not miataken. All that i remember was that the uke when he was a baby, was found in the forest by the seme, i think. And that uke became a sacrifice where the village used his body to conceal this black thing through a ritual. The black thing was concealed in the body and was passed down when the sacrifice can no longer contain the black things power. The black thing grows bigger as the time passed by.

That is all that i remebered. I hope that it helps. Btw, this manga was incomplete.

Thanks for helping!!! (●'◡'●)ﾉ